io.crate.expression.operator

Class LikeOperator

java.lang.Object

io.crate.metadata.Scalar<java.lang.Boolean,I>

io.crate.expression.operator.Operator<org.apache.lucene.util.BytesRef>

io.crate.expression.operator.LikeOperator

All Implemented Interfaces:

OperatorFormatSpec, FunctionImplementation

public class LikeOperator
extends Operator<org.apache.lucene.util.BytesRef>

Field Summary

Fields

Modifier and Type	Field and Description
static char	DEFAULT_ESCAPE
static java.lang.String	NAME

Fields inherited from class io.crate.expression.operator.Operator

PREFIX, RETURN_TYPE

Constructor Summary

Constructors

Constructor and Description
LikeOperator(FunctionInfo info)

Method Summary

Modifier and Type	Method and Description
Scalar<java.lang.Boolean,org.apache.lucene.util.BytesRef>	compile(java.util.List<Symbol> arguments) Called to return a "optimized" version of a scalar implementation.
java.lang.Boolean	evaluate(Input<org.apache.lucene.util.BytesRef>... args) Evaluate the function using the provided arguments
FunctionInfo	info() Provides meta information about this function implementation.
static java.lang.String	patternToRegex(java.lang.String patternString, char escapeChar, boolean shouldEscape)
static void	register(OperatorModule module)

Methods inherited from class io.crate.expression.operator.Operator

generateInfo, normalizeSymbol, operator

Methods inherited from class io.crate.metadata.Scalar

anyNonLiterals, evaluateIfLiterals, withOperator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

DEFAULT_ESCAPE

public static final char DEFAULT_ESCAPE

See Also:

Constant Field Values

Constructor Detail

LikeOperator

public LikeOperator(FunctionInfo info)

Method Detail

register

public static void register(OperatorModule module)

info

public FunctionInfo info()

Description copied from interface: FunctionImplementation

Provides meta information about this function implementation.

compile

public Scalar<java.lang.Boolean,org.apache.lucene.util.BytesRef> compile(java.util.List<Symbol> arguments)

Description copied from class: Scalar

Called to return a "optimized" version of a scalar implementation. The returned instance will only be used in the context of a single query (or rather, a subset of a single query if executed distributed).

Overrides:

compile in class Scalar<java.lang.Boolean,org.apache.lucene.util.BytesRef>

Parameters:

arguments - arguments in symbol form. If any symbols are literals, any arguments passed to Scalar.evaluate(Input[]) will have the same value as those literals. (Within the scope of a single operation)

evaluate

public java.lang.Boolean evaluate(Input<org.apache.lucene.util.BytesRef>... args)

Description copied from class: Scalar

Evaluate the function using the provided arguments

Specified by:

evaluate in class Scalar<java.lang.Boolean,org.apache.lucene.util.BytesRef>

patternToRegex

public static java.lang.String patternToRegex(java.lang.String patternString,
                                              char escapeChar,
                                              boolean shouldEscape)